can't write body message

please help!i can not fiind any answer for this on the forums!my problem:

if i try to write a message to another member i can insert only the subject message but i can not write the body message!

please give me a link to a topic that solve a problem like mine or an ideea what to do next!

Thanks!

ps: one more thing...i have notice that if i upload .avi video files it's ok...if i try width .flv it's give me some errors!

my website: here!

username:user

password: username

for testing!if any interestead!

anybody?

very strange!from my work office it works but not from home..hmmm ...maybe the operating system!or the browser!