Hello PerryMc,
Sorry to hear that your iPhone is currently not recognized by iTunes. I found an article with steps you can take when you experience an issue like this.
I wasn't sure whether you were using a Windows or Mac computer, so I included the respective articles for each:
iOS: Device not recognized in iTunes for Windows
http://support.apple.com/kb/TS1538
iOS: Device not recognized in iTunes for Mac OS X
http://support.apple.com/kb/TS1591
Thank you for using Apple Support Communities.
Best,
Sheila M.