LDN - Luminis Developer Network

I am trying to copy some custom java files created earlier to help us with custom channels. The custom channel used these java files to give us the Emergency Notification Channel. Now when i copy the java files, it is giving me a system error saying that

Can't service request to render.userlayoutUportal.up
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org.jasig.portal.IHtmlChannel

This code is being used in "BaseChannel" used to get Luminis User info. Does anybody else have this problem? Do you know what the workaround is?

I think the error i am getting is at (located in file USD_BaseChannel.java):
import org.jasig.portal.IHtmlChannel;

There is also another place where IHtmlChannel appears:

abstract public class USD_baseChan extends BaseChannel implements IHtmlChannel

Do you guys know anything about this issue?
Any help would be greatly appreciated?

Thank you,
-SHiva