What OSC are you running at?
64233 would be close for 20Mhz.
With 16Mhz OSC it would give 3.06 Khz.
Turn on XP compatability mode for PicMultiCalc.picmulticalc will not run in windows 7
The EXT (external) modifier.Timer1 VAR WORD EXT ; what does the EXT stand for?
http://www.picbasic.co.uk/forum/showthread.php?t=3891
Scroll down to ... Using EXT with Variables.
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