cant upload lj demo

Hey guys,

I have problems with uploading my 251 lj demo.
I did everything as it's said on this side.

Named it after 251_lj_BunnyTsukino.dem and put it in the .rar archiv which has the same name as the demo.

But when i try to upload it it say that it hasn't the right format or is too long, but its only ~155kb!

Would be happy if you could help me.

cheers