I'm trying to upgrade my website www.maxpoly.co.uk/site2 from 1.3.8a to 1.3.9c and would really appreciate some help!

I followed the installer instructions by first removing the Paypal payment modules and shipping modules. I then ran through the steps to upgrade including ftp'ing the new files across. These went in a new directory www.maxpoly.co.uk/site2new and I then ran through the zc_install upgrade all ok.

Finally I modified the two configure.php files to make sure the database details were correct and that the files pointed to the /site2new directory rather than the old /site2 shop directory.

However.......if i point my browser to www.maxpoly.co.uk/site2 all I get is a blank screen.

Have I missed some step in the install or is there something more tricky to find going on?

TIA, Andrew