Please do not type in all caps as it appears as if you are SHOUTING VERY LOUDLY....and it is hard to read as well.
If you change the name of your wireless network, then you will have to change the settings on all of the devices to allow them to connect to the "new" network.
You did not tell us what operating system your Mac is using, so we can't provide specific instructions on how to do what you want until we receive that information.
If you are not sure what operating system your Mac is using, click the Apple icon in the uppoer left corner of the Mac's screen, then click on About This Mac. Post back with the OS X Version number that you see there.
Open Macintosh HD > Applications > Utilities > AirPort Utility
Click on the Time Capsule icon, then click Edit
Click the Wireless tab at the top of the window
Edit the Wireless Network Name as you wish*
Click Update at the lower right of the window and allow 30 seconds for the Time Capsule to restart
*Ideally, the wireless network name will not exceed 12 characters with no spaces and will avoid any special characters like an apostrophe, asterisk, dollar sign, etc.