Horde error, please help

[jerry2]

Hi there

I tried uninstall of Horde using Plesk and install again and still:

Warning: getblock(C:\Inetpub\vhosts\webmail\horde\config/../lib/Block/account.php): failed to open stream: No such file or directory in C:\Inetpub\vhosts\webmail\horde\lib\Horde\Block\Collection.php on line 118

Warning: getblock(): Failed opening 'C:\Inetpub\vhosts\webmail\horde\config/../lib/Block/account.php' for inclusion (include_path='C:\Inetpub\vhosts\webmail\horde\lib;C:/inetpub/vhosts/webmail/horde/pear;./lib;.;./includes;./pear') in C:\Inetpub\vhosts\webmail\horde\lib\Horde\Block\Collection.php on line 118

What would this errors mean? :-(