alt_signaltap_run can't work correctly.

Hello,

Perhaps you could help me run alt_signaltap_run.dll from Matlab R2010a

I've followed the steps noted on page 15-62 of Quartus handbook (altera.com/literature/hb/qts/qts_qii5v3_05.pdf)

However I am not able to run alt_signaltap_run from Matlab. I have tried renaming the extension to .mex, .mexw32 and .mexw64, but it doesn't work either.

In Matlab:

>> addpath('C:\altera\91\quartus\bin')
>> alt_signal_tap.dll
??? Undefined function or variable 'alt_signal_tap'.
 
>> alt_signal_tap
??? Undefined function or variable 'alt_signal_tap'.

I am using Quartus v9.1 SP2 (64-bit) on a Windows 7 system.

I appreciate any guidance you could provide.