Error in IMP 2.2.6

[Guillermo Guillen Angel]

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Hi list.

I've been trying to install IMP 2.2.6 with Horde 1.2.6
I configured it but when I try to open it, it sends me this error

Fatal error: Cannot instantiate non-existent class: hordesession in
/usr/local/apache/php/page.inc on line 18


I've been triyng to install diferent versions of IMP, including IMP
2.3.7 but I haven't been able to get it to work
so I'm trying with version 2.2.6

Thanks for the help



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L.I. Guillermo Guillén Angel                 tels. 36194028  ext. 117
Jefe del                                           36196910
Centro de Computo de Investigación y Posgrado      36192379
CUCEI                                              36196017
Universidad de Guadalajara                         36503680
                                             fax.  36194028
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