AFP problem in Portal 7.4 SP8

Hi

We are using Portal 7.4 SP8.

I have found that below functionalists not working using Ajax Frame WorkPage

1) Clicking any node in MSS ADDON 1.0 role pointing to HOME PAGE

2) Clicking node not displaying services underneath it.

3) Not able to launch Appraisal document

4) Most of reports infinite looping

Surprisingly all the issues were sorted out when using /portal/classic with out any further changes.

May i know what was wrong with AFP and how all functionalists working as expected when using standard framework page ?

Thanks