Btcl standalone job for discover

I want to run a discover standalone job script via btcl.

I have saved all the files necessary (.inp, .car, .mdf, .xsd and .xms), by using the material studios interface, in a path without any spaces in it, as stated in help.

When I run the RunDiscover.bat, found in C:\Program Files (x86)\Accelrys\Materials Studio 4.4\etc\Discover\bin and enter the commands as stated both in help and even in some dissscussions in this forum, i.e.; RunDiscover [-np 4] F:\....

I get an error;

Error: invalid command name "-np"

          While executing

"-np 4"

     Invoked from within

"RunDiscover [-np 4]..."

Even when I just type in RunDiscover I still get an error;

Error: invalid command name "RunDiscover"

          While executing

"RunDiscover"

     Invoked from within

"RunDiscover"

Also the same happens when I just type in the command for help; RunDiscover [-h], I still get the same, corresponding error.

I am using materials studio v4.4 on win xp 64 bit,.

May anyone please tell me what am I doing wrong.

Thankyou