Multisession CD Problem with NeroCMD

I have a 300MB data in multisession CD.

yesterday, I’ve written a 50MB data to the CD using NeroCMD.

But I could not see the previous 300MB data after burning.

the following is the parameter i used

–write
–real
–tao
–close_session
–drivename “f”
–iso “Test”
–disable_eject
D:\driver* --recursive
–error_log MyErrorLog.txt

how to preserve the previous data when i create a multisession CD with NeroCMD?