403 not fixed?!

[hqforumx]

Its been couple of months now I've been waiting long time for 403 to get fixed because I can't edit my Tabbed Menu plugin which i installed on MyBB forum as I need it... Also i can't create Thread Prefix... I get same error 403..

Forbidden
You don't have permission to access /forum/admin/index.php on this server.

Would you guys please help me fix this, because its getting really annoying I can't do anything.

Thank You

 

[hqforumx]

Another error now...

406 Not Acceptable
Not Acceptable
An appropriate representation of the requested resource /forum/admin/index.php could not be found on this server.

 

[vortexbb]

Same with me using MyBB 1.6 tried to create a thread prefix for my forum i get 403 error...