Error when installing the extension

Hi,

I update forum from 1.3.4 to 1.4.2 and I have problem when I try instal any extension from admin panel.
On 1.3.4 works fine.

I get error "Parse error: syntax error, unexpected ';' in ../admin/extensions.php(707) : eval()'d code on line 951 "

Do you know where it can be a problem?