snapshot in a different location using vix api

Hi,

I wish to take snapshot in a user specifed location i.e other than the default location. when i edit and given 'workingDir=""; in vmx file its working only when i take snapshot  from the  webconsole, but when i use my application (which is wrriten using vix api &  C++)  its not taking the snapshot. Also it returing no errors.

Im using the following function 

VixVM_CreateSnapshot(vmHandle,

        "MyFirstVmWareSnapShot",

        "This is my first snap shot",

        VIX_SNAPSHOT_INCLUDE_MEMORY,

        VIX_INVALID_HANDLE,

        NULL,

        NULL);

is there any other option i have to set ?

Thanks in advance

Regards,

Prince.