HELP...My forum has been infected with a virus

[John59]

Hi to all
i have the same problem,
It all started on the first of May
i cleaned and restore everything to a month ego except the database
and attachments (mainly photos, no programs or any code )
the problem keeps coming buck every 4 - 5 days all .php files are modified
or some del, the first time it happened i also had the above code in all .php
files.
I contacted my host and they just keep giving me advice how to check and secure
my code (VB in my case) and they do nothing,
I also come to believe that the problem is host security problem,
Do you think that if i change host (since they do not seem to accept that it is a host security problem and investigate they are doing nothing to help just polite talk and advices )
will My problems be over??
Ps. I know nothing about programing and .PHP
Only how to upload and use VB (3 years experience)