Error when Matlab talks to USRP2

I'm facing an error when I try to connect my laptop to a USRP2. I am using Matlab R2012a. I have downloaded and flashed the SD card in the USRP2 with the firmware and fpga images from the 003.002.002 release. The choice of an older release is because when I tried it with the latest stable one, it complained that it was incompatible.

When I add the sdru and type in 'findsdru', it detects the USRP2 successfully with an IP address of 192.168.10.3. However, when I try to create a transmitter or receiver block using the same IP address, it throws this error:

"Could not execute UHD driver command in 'createDriver_c': Could not create a UHD driver using IP addr '192.168.10.3'. Attach a device at the specified address, correct the specified address to match an already attached device, or continue to work in off-line mode. Error from UHD: LookupError: KeyError: No devices found for -----> Device Address: addr: 192.168.10.3"

I tried to change the SD card and the LAN cable, but the error persisted. The same procedure for another USRP2 works perfectly. Could you help me out with what is going wrong?

Thanks!