I don`t know how you were able to kill you PT-Show card, but you can connect directly from the DB25 ILDA in.
Here you find the pinout for the ILDA standard.
http://www.laserfx.com/Backstage.Las.../Pinouts9.html
If you are not comfortable doing this, then Stanwax ILDA brakoutboard will make things a lot easyer.
http://shop.stanwaxlaser.co.uk/gener...oard-365-p.asp
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