Xilinx Integration: No ModelSim GUI appears when simulation called from ISE Project Navagator

Need to change a TCL script. On the machine its

C:\Tools\Xilinx\13.2\ISE_DS\ISE\data\projnav\scripts\dpm_modelsimTasks.tcl

on line 77 there is this if statement

          if { [dpm_flowsTestBatchEnv] } {

            set sBatchSwitch "-c"

          } else {

            set sBatchSwitch ""

          }

Add the -gui switch to the else condition so the statement reads

          if { [dpm_flowsTestBatchEnv] } {

            set sBatchSwitch "-c"

          } else {

            set sBatchSwitch "-gui"

         }