Script Problems

My apologies if this message shows up twice on the mail list, my original posting doesn't appear to have gone through....... I am in the process of moving my website off of a linux box running php3, on to a Win2k server running php4 and several of my scripts have stopped working correctly. The problem is I keep getting undefined variable errors on scripts that ran perfectly fine under php3. For example; <tr> <td bgcolor="#006699" align="center" width="245"> <input type="hidden" name="app" value="application"> <font face="Arial, Helvetica, sans-serif" color="#FFFFFF" size="2">Model Number</font><br> <input type="text" name="model" size="22" maxlength="20" value="<?php echo $model?>"> </td> Returns - Warning: Undefined Variable: model in .....Then the file name and line number. This one: <td bgcolor="#006699" align="center" width="245"> <input type="hidden" name="parts" value="primary_description"> <font face="Arial, Helvetica, sans-serif" color="#FFFFFF" size="2">Parts Description</font><br> <input type="text" name="part" size="22" maxlength="25" value="<?php echo $part?>"> </td> Returns - Warning: Undefined Variable: part in .......etc., etc. Everything runs fine under php3 and linux, but falls apart under php4 and Win2k. Any suggestions? Thank you, Mark Mark Barton Abilene Machine, Inc e-mail: mbarton@abilenemachine.com Abilene, Kansas web: http://www.abilenemachine.com