Extension not created in schema but there in extension defin

Hi,

Need help on the below issue.

I imported the oma for extension. It got created in extension def but not there in extension schema.

Background status shows

Re-posting deffered sql event for : -2147482747 e-Form at Mon Nov 17 10:44:42 CET 2014

What should i do next. I tried reimporting the oma but it says

Import failed for object number 1. The CLASS_STATE cannoot be changed once the object is saved. [CLASS_STATE].

Thanks in advance.

Regards,

Geetika Bansal