I cant run shell command on win2003 with iis6

My phpscript with external command ran OK on Win2K server with IIS5 but when I moved them to Win2K3 and IIS6 none shell command could not be executed. exec("dir f:", $out); $out1=dir f:\imail\users /b; echo "x<pre>".$out.$out1."</pre>y" ; Have anyboby same ideas? -- Simos Anagnostakis Dept. of Primary Education University of Crete Campus Rethymno 74100 tel +302831077623 fax 77596