Thanks for replying Chris, after futher investigate it does appear to be a CS5 issue, in both CS3 and CS4 the script works as, well it imports the text. In CS5 the a digalog opens and let you set the paramiters for the import but when you click OK it doesn’t open a dialoge to select the text file. In CS3/4, a dialoge opens half the options are missing (i don’t need them so its a solve) but when you click ok it does open a select file dialoge and it succufully imports the text so I’ll use another machine.
Can anyone see a reason not to have AE CS4 and 5 on the same machine ?