Please do not double post.
Your issue will not get solved any faster.
Joomla!/K2 uses the limit set by your PHP settings. You can edit your php.ini if you have access or you can ask your host to do it for you.
By default it's two mb, I think if you set to 4 if you upload large images or 20 if you are uploading songs you 'd be ok.
JoomlaWorks Support Team
---
Please search the forum before posting a new topic :)