error while setting up the configuration for XI integration builder

Hi experts,

I am trying to configure the XI integration builder.

I have created an entry in table SPROXSET and created an RFC destination of type G.

After that I am trying to execute the SPROXY, I am getting an error "IFR_HTTP_DEST must not be set in table SPROXSET;"

( IFR_HTTP_DEST is the entry in the table SPROXSET)

Please give me solution to this error....This is very urgent.....

Thanks,

Madhuri.