increase php upload time -

i face problem uploading files in php script on external server wich have no privileges edit files, small files ok whene try upload bigger file (not 27mb) after 5 minutes error message:

internal server error

the server encountered internal error or misconfiguration , unable complete request.

i tried possible solutions:

1. add php.ini file in folder

2. add .htaccess file

i change following parameters:

• max_input_time = 900

• upload_max_filesize = 40m

• post_max_size = 40m

• memory_limit = 256m

• i tried set_time_limit(900) function in script.

with changes when use phpinfo() function see time , size increased still have timeout problem after 300 seconds.

is there solution problem ?