Hi - Thanks for the prompt response.
1. Yes - I want to be able to use PHD2 for autoguiding (correction) - as the primary guidance is not as accurate as anticipated. The Altair is 'for the moment' going to guide, with a DSLR for imaging.
2. The 4SE has to ports (AUX and CAMERA) - with a supplied lead . . . I'm assuming this to be an ST4 (However, I'm trying to use the Handset via USB IN PHD2)
3. Handset is connected to the Laptop and is seen as COM4
The 'Celestron' ASCOM drivers kick in when I load, and show me a 'N.E.S.W' with speeds control selection - This drives the scope perfectly, so there's obviously signal getting through.
I've also switched the tracking mode to 'OFF' as this was advised in another Forum (Somewhere) - But makes no difference at the moment regardless.