DROP INDEX gets Msg 3624

Hi all,
Please help.
I am running into problem of droping an Idex.
My statement is:
DROP INDEX tblPkgInfo.Tracking

I get the following:
Server: Msg 3624, Level 20, State 1, Line 1

Location: recbase.cpp:1371
Expression: m_nVars > 0
SPID: 51
Process ID: 2068

Connection Broken
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What do I do?What do you get when you run DBCC CHECKTABLE (tablename)?

where tablename is the name of your table