GPIB time out

Hi, When I try to control Newport ESP300 motion driver/controler with SR55CC rotary stage by NI GPIB controller,very often I meet with the time out error. If we ignore the error, ,after a while the control come back to life, we can control it already. Any one has similar experience with that or who can have good suggestion?
I'm using LABVIEW 5.1, for windows 98. I also attach my code. Anyone interested can go and take a look. Thank you!
Attachments:
ESP300_Home.llb ‏485 KB

Not sure how old is your ESP300 controller, you need to have the latest firmware, 3.09
Here is attached a MSWord document that will help with the GPIB setup.
There is no problem with hardware, the library might have a problem, if you call Newport Technical Support they could provide the Labview example that works fine.
Attachments:
ESP300 GPIB Communication.doc ‏301 KB

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