Unable to create callable object of type Webdynpro (GP Interface)

I am getting the following error message when i try to create a callable object of type webdynpro in GP. It was working fine, but when i added component reuse it start giving me the following error:
"Cannot read callable object description from component: <null>"
I also have the library "caf/eu/gp/api" in my project, so i know that is not the problem.
So basically, my project was working fine until i added component resue that it is not letting me create a callable object in GP.
Any help will be appreciated.
Thanks

That problem is now solved, i dont know how but i took out and putted back my component reuse and it worked. But now components that are deployed to the server and are functioning properly, stop working after the server is rebooted. Simply redeploying the component does not make it work again.
A note: One way that we've been able to "work around" this has been to modify the components in some way, rebuild, redeploy. Exactly what modifications that make it function again, is unknown.
Any help on tha issue will be appreciated.
Thanks
Nahman

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