Error Message - Help!

I tried using Skype the other day (has been successful so far) and got this message:

Skype quit unexpectedly.
click reopen to open the application again. Click Report to see more detailed information and send a report to Apple.

I get the same message with IPhoto. Could it be my memory, maybe i don't have enough to run these programs??

(Option buttons: ignore, report, reopen)