Problems when search in BioLip database

Hi !
Recently I find when I search BIoLip database with Ligand name, there would come out the same error warning , I post them as follow

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, root@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Apache/2.2.15 (Red Hat) Server at zhanglab.ccmb.med.umich.edu Port 443

But It works well when I search the ligand ID.
Besides ,I would like to know if there is any method to distinguish DNA ligand and RNA ligand (which I notice cannot be searched directly) from "nucleic acid ligand data"?

I'm looking forward for your reply.

Thanks,
shanshan