Prob with parameter in where clause in iReports

In the report query in iReports(3.0.0) this works if I put in a state without quotes in the parameter prompt:

     m.merchant_id  IN($P{RP_COMPANY})  AND                              
     ad.state            IN($P{RP_STATE})         AND ....

if I put in a state with quotes it will not work.  Why?

If I hard code several states, the program works:
    m.merchant_id    IN($P{RP_COMPANY})                 AND                              
    ad.state                IN('PENNSYLVANIA','TEXAS')    AND
but if I put the exact same text in the parameter prompt, it will not run.
I have tried it without quotes also, but still doesn't work
eejkkAsked:
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mrcoffee365Commented:
There's no problem with having an "In" clause where there's only one element in the array.

So something else must be going wrong.

If your problem is that the first scrap of code doesn't work, then something is wrong with the string in $P{RP_STATE} .  Maybe the string does not have single quotes around it.  Maybe it's null -- that won't work.  Hard to tell without knowing what $P{RP_STATE} is.
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