Drop downs are blank in EBP , urgent problem !!

Hello,

When the users try to create shopping cart, they have tab special request and fields Unit and Product Category in it. They select the value from the drop down list.

The drop down lists are totally empty with no data at all.

They go ahead to create shopping cart and get error that unit and product category is absent

and after this error when they visit the screen again, they can now see the values.

In the same site, there is a report to update approvers for cost categories. The drop down values are not seen for the fields of this report.

The user has no workaround at all.

He clicks a few other links here and there and then again this report, the dropdown values suddenly appear.

We are not able to check whey these values disappear from the dropdown.

Could you please give some hints ?

This problem is really urgent !

thank you

Bhakti.