problem with uploaded image with crop and resize

[eluser]davidino86[/eluser]
Hi,

i've write a function to upload an image in two directory one for the big and one for a thumbnail.

root
|
|-> uploads
|
|-> thumb


this function works fine in localhost but when i try to make it works online, it didn't works only for the thumbnail. I'have check the phpinfo() of both server and the php.ini file and i think there isn't hard differences. the permissions are correctly configured to write and read credetial on directories.

someone can help me to understand the problem?


PS.: sorry for the bad english

Thanks
Davide