dblink_connect fails

Hello All
Im trying to use dblink set of functions in PostGreSql 7.3.4. My environment is WinNT and cygwin. I try to connect to a different database using dblink_connect. In my pl/pgsql statement

....
perform dblink_connect(\'dbname=generic\');
.....

When i call this function, PostGreSql throws the following error:

ERROR: dblink_connect: connection error: could not send startup packet: Transport endpoint is not connected

Im calling the above function from a Java program.

But i tried out a sample function that works fine! This sample function works fine from psql prompt and from a java program.
Can anybody help in understanding this error better?

Thanks in advance.

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