Problem when adding ibproarcade as a plugin

[nofat.co.nz]

It's really weird, I have had the arcade installed before - got hacked - took it completely off - then tried to add it from scratch, used the instructions, got to the bit where you go to the admin section, Enter the path to the Product-XML-File: ./includes/xml/product-ibproarcade.xml and click IMPORT
Confirm the Import of that Product

Then it comes up with an error :( :

Not Acceptable
An appropriate representation of the requested resource /admincp/plugin.php could not be found on this server.

Which is weird, as I went and looked and I have a file /admincp/plugin.php :confused::confused:

Please can someone help me

(I'm running VB 3.6.8 patch level 2 and trying to put in the latest version of ibproarcade)

Thanks :)

--------------- Added 1203730963 at 1203730963 ---------------

and... I just went now and re-uploaded plugin.php just to be certain - and it still comes up with the same error :eek::eek:

--------------- Added 1203741710 at 1203741710 ---------------

Don't worry I figured it out ;)