Install crashed forums

[apc]

Just installed 0.97; here is the confirmation:

"The package was installed successfully. You should now be able to use whatever functionality it adds or changes; or not be able to use functionality it removes."

However, the entire forum has now crashed with:

"Fatal error: Call to undefined function: tp_loadtheme() in /home/account_name/public_html/forums/Sources/Load.php on line 1133"

I am totally locked out and cannot uninstall the package.

How can I fix this urgently?

Thanks.

[G6Cad]

By using the premade zip file from the installations board and extract the files and upload them to your forum and overvrite the old ones.
Refresh and have a look