McBSP example on LCDK C6748 fails.

Hello,

I tried to run McBSP examples which came with biospsp_03_00_01_00. When the code reaches 

mcbspTxHandle = GIO_create("/mcbsp1", GIO_OUTPUT, &ioParams, &eb); 

line of the code, GIO_crate fails with

"report ti.sysbios.io.GIO: line 248: E_createFailed: mdCreateChan returned error -10".

I am using "bios_6_35_01_29".

What can I do to solve the problem?

Thanks.

Onur