RTFS sata example could not mount sata

Dear eyeryone:

I use the RTFS system to read and write SATA on the OMAP-L138 board. And I use bios_5_41_13_42, rtfs_1_10_02_32, pspdrivers_01_30_01.

I just use the example in ti\rtfs_1_10_02_32\packages\ti\rtfs\examples\sata\bios5\evm6748\ccs4. And I use mini sata.

The pure example project could secceed. But after I construct a new project based on it, which put the whole example program in the main task, and call the writereadData() function in other task. The result is the whole example program in the main task ran successfully, but it run fly in writereadData() of another task. Actually it stuck in the rtfs library function like  fopen(), open(), write(), read() etc.

 I consider maybe the sata did not mount on so I could not access the disk path, like rtfs:A:\\TopLevel\\dma\\indir.txt. So what's the actual problem?

I am very confused. Please help me. Thanks a lot.

Regards 

Samantha