request ?

hello,
i am using libpq.lib to access the postgresql database in windows xp using
c++ (VC++ 6.0) , i am getting one error when compiling ,kindly help me .
this is the error ..

*libpq.lib : fatal error LNK1136: invalid or corrupt file*

this is my code

#include <stdlib.h>
#include <libpq-fe.h>

int main()
{
PGconn *myconnection = PQconnectdb("");
if(PQstatus(myconnection) == CONNECTION_OK)
printf("connection made\n");
else
printf("connection failed\n");
PQfinish(myconnection);
return EXIT_SUCCESS;
}

thanks and regards

vinoth