I can't open the iPhoto. it freezes and i must quit it!

I have been trying to open my iPhoto already a week. it opens but doesn't load the pictures and it freezes. I must always quit to be able to continue working.

I have already reinstalled it. NO helpful. I have already reinstalled the Yosemite. No helpful.

here is the crash message I have when I quit.

That is the message I RECEIVED WHEN I FORCED TO QUIT THE IPHOTO:

Date/Time: 2015-03-31 11:07:52 +0200

OS Version: 10.10.2 (Build 14C109)

Architecture: x86_64

Report Version: 21

Command: iPhoto

Path: /Applications/iPhoto.app/Contents/MacOS/iPhoto

Version: 9.6.1 (910.42)

Build Version: 1

Project Name: iPhotoProject

Source Version: 910042000000000

App Item ID: 408981381

App External ID: 811998964

Parent: launchd [1]

PID: 803

Event: hang

Duration: 1.30s (process was unresponsive for 96 seconds before sampling)

Steps: 14 (100ms sampling interval)

Hardware model: iMac8,1

Active cpus: 2

Fan speed: 698 rpm

--------------------------------------------------

Timeline format: stacks are sorted chronologically

Use -i and -heavy to re-report with count sorting

--------------------------------------------------

Heaviest stack for the main thread of the target process:

14 start + 1 (libdyld.dylib + 13769) [0x7fff8bd715c9]

14 ??? (iPhoto + 67823) [0x106d798ef]

14 NSApplicationMain + 1832 (AppKit + 10772) [0x7fff8a482a14]

14 -[NSApplication run] + 594 (AppKit + 95635) [0x7fff8a497593]

14 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 194 (AppKit + 145200) [0x7fff8a4a3730]

14 _DPSNextEvent + 964 (AppKit + 147329) [0x7fff8a4a3f81]

14 _BlockUntilNextEventMatchingListInModeWithFilter + 71 (HIToolbox + 190123) [0x7fff8c2e66ab]

14 ReceiveNextEventCommon + 431 (HIToolbox + 190570) [0x7fff8c2e686a]

14 RunCurrentEventLoopInMode + 235 (HIToolbox + 191215) [0x7fff8c2e6aef]

14 CFRunLoopRunSpecific + 328 (CoreFoundation + 465016) [0x7fff90928878]

14 __CFRunLoopDoObservers + 368 (CoreFoundation + 523520) [0x7fff90936d00]

14 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23 (CoreFoundation + 523687) [0x7fff90936da7]

14 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 71 (QuartzCore + 146605) [0x7fff87c7acad]

14 CA::Transaction::commit() + 390 (QuartzCore + 77476) [0x7fff87c69ea4]

14 CA::Context::commit_transaction(CA::Transaction*) + 242 (QuartzCore + 78414) [0x7fff87c6a24e]

14 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 35 (QuartzCore + 80573) [0x7fff87c6aabd]

14 CA::Layer::display_if_needed(CA::Transaction*) + 603 (QuartzCore + 82817) [0x7fff87c6b381]

14 -[_NSViewBackingLayer display] + 834 (AppKit + 1217209) [0x7fff8a5a92b9]

14 _NSBackingLayerDisplay + 617 (AppKit + 1389471) [0x7fff8a5d339f]

14 CA::Layer::display_() + 1546 (QuartzCore + 85084) [0x7fff87c6bc5c]

14 x_blame_allocations + 81 (QuartzCore + 86367) [0x7fff87c6c15f]

14 ___ZN2CA5Layer8display_Ev_block_invoke + 59 (QuartzCore + 86435) [0x7fff87c6c1a3]

14 CABackingStoreUpdate_ + 3306 (QuartzCore + 89747) [0x7fff87c6ce93]

14 -[NSView(NSLayerKitGlue) drawLayer:inContext:] + 108 (AppKit + 1389763) [0x7fff8a5d34c3]

14 -[NSView(NSLayerKitGlue) _drawViewBackingLayer:inContext:drawingHandler:] + 2407 (AppKit + 1392193) [0x7fff8a5d3e41]

14 __46-[NSView(NSLayerKitGlue) drawLayer:inContext:]_block_invoke + 218 (AppKit + 1392808) [0x7fff8a5d40a8]

14 -[NSView(NSInternal) _recursive:displayRectIgnoringOpacity:inGraphicsContext:CGContext:topView:shoul dChangeFontReferenceColor:] + 1186 (AppKit + 1394265) [0x7fff8a5d4659]

14 ??? (iPhoto + 2108119) [0x106f6bad7]

4 ??? (iPhoto + 2108776) [0x106f6bd68]

4 -[NSBezierPath(NSBezierPathDevicePrimitives) _deviceMoveToPoint:] + 130 (AppKit + 1657478) [0x7fff8a614a86]

2 -[NSBezierPath(NSBezierPathDevicePrimitives) _addPathSegment:point:] + 205 (AppKit + 1657733) [0x7fff8a614b85]

*2 hndl_alltraps + 229 (kernel + 2319765) [0xffffff8000436595]

*2 user_trap + 756 (kernel + 2206068) [0xffffff800041a974]

*1 vm_fault_internal + 5176 (kernel + 1694936) [0xffffff800039dcd8]

*1 delay_for_interval + 89 (kernel + 1236201) [0xffffff800032dce9]

*1 thread_block_reason + 175 (kernel + 1335599) [0xffffff800034612f]

*1 ??? (kernel + 1345492) [0xffffff80003487d4]

*1 machine_switch_context + 367 (kernel + 2186783) [0xffffff8000415e1f]

Process: iPhoto [803]

Path: /Applications/iPhoto.app/Contents/MacOS/iPhoto

Architecture: x86_64

Parent: launchd [1]

UID: 501

Task size: 131511 pages (+162)

CPU Time: 0.689s

Note: Unresponsive for 96 seconds before sampling

Note: 3 idle work queue threads omitted

Anyone can help me?