how to delete trajectory file

Hi MS Usear
I wrote the command for dynamic run as follows:


1. for (my \\\$yPos=0;\\\$yPos<=301; \\\$yPos) {

2. my \\\$results =Modules->Forcite->Dynamics->Run(\\\$doc);

and to delete the trajectory file I wrote:

3. my \\\$trajectory = \\\$Documents{"filename.xtd"}->Trajectory;

4. \\\$trajectory->Delete;
but the .xtd file does delete. I tried by using "unlink" command, it doesnot delete
Can any one please give me some idea how to delete a file?
Thanks in advance
Laxmi