Dear Nima,
have you tried the folowing command
c:\aolserver\bin\tclsh85t \xotcl-1.6.0\tests\speedtest.xotcl
?
Does it work?
Have you added c:\aolserver\bin to the PATH variable?
Have you set up the variable TCLLIBPATH to c:\aolserver\lib?
Thanks in advance,
Maurizio