Ive uploaded an image, its viewable but when i choose it for the banner on my forum it will not click an choose it.. is there a size limit? if so it should error on me but it dont do that either..any suggestions??

Sorry but html does not involve "click an choose it". It sounds as if you have an issue with some proprietory software.

Do you mean a Bravenet forum?
Have you uploaded the banner to a Bravenet hosted site, a site hosted elsewhere or a Bravenet photo center?
If Bravenet is everything under the same account?