Reg linking main object file with the archive(lib)

hi, I have main.for which calls various subroutines. I compiled all the fortran program and subroutines to create obj file. I made use of slink to create archive in command line mode.I had no problems till this stage, but when i use the following command to create executable it gives me an access violation error.
slink main.obj myprog.lib -file:maintest. I am making use of windows 7 64 bit machine. Thanks in advance.