Com Port Data Errors

[Camm29]

Hi ,

Baud 9600 , 8 Bits , 1 Stop

Trying to send command and retrieve data at < 1 second intervals via Com Port.

Something like ,

repeat xx
write "AT00" & numToChar(13) to driver COM1:
wait ----- sometime
read from driver COM1:
put it into received
end repeat 
 
This works great with wait time >= 1 second but errors if any faster.

One point is that with the same command "AT00" , HYPERTERMINAL works always with wait time < 1 second.

Please help , have i missed something simple

Camm