Custom receive pipe line error

Hi,

I created a custom receive piple line to convert the flat file into xml. I am using the flat file schema as Document Schema.

I am getting following error when I drop flat file in the input folder.

There was a failure executing the receive pipeline:
"SampleTDPO3.ReceiveTDPOFlat, SampleTDPO3, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=3e4eb9c872147ff3" Source: "Unknown " Receive Port:
"rpTDPOSample3" URI: "C:\Excercise_Siva\SampleTDPO3\IN\*.txt" Reason: Failed
to get pipeline: SampleTDPO3.ReceiveTDPOFlat, SampleTDPO3, Version=1.0.0.0,
Culture=neutral, PublicKeyToken=3e4eb9c872147ff3. Please verify that the
pipeline strong name is correct and that the pipeline assembly is in the GAC.

In the Receive Pipe line properties there are 3 fileds for schema, Document
Schema, Header Schmea and Trailer Schema. I set the Document Schema field to
the Flat file Schema that I created and rest both I left as "NONe"

Why do I get the above error?
How to verify that the pipeline strong name is correct and that the pipeline assembly is in the GAC ? I have no idea about it.

Thank you in advance,

Siva