wont let me upload pictures

For some reason I was able to load 2 new pictures into a new album and now I can not get anymore pictures in. Can't figure out why or find any helpful info - anyone out there had the same problem? Please use small words - I'm a beginner.
The following information is required to get an answer:
Get this information from the PHP diagnostic (in the configuration wizard).
Gallery URL (optional but very useful):url:http://sheclimbscarolina.org/Gallery/
Gallery version:1
Apache version:
PHP version (don't just say PHP 4, please):
Graphics Toolkit:
Operating system:
Web browser/version (if applicable): startlogic