Need help getting 2nd 5870 working with GUIminer 2011-06-14 on Linuxcoin 0.2b

[davebodger]

I have a new rig I put together from bits I had laying around - AMD CPU and 2 x 5870 GPUs.
I used Linuxcoin 0.2b-final on a USB stick so I didn't have to buy another copy of Windows or a HDD.
It is working and mining OK on GPU 0, but GPU 1 throws out this message in GUIminer when I try to start it :-

2013-01-13 11:19:18: Running command: python poclbm.py http://xxxxxx:yyyyyy@bitcoin.lc:8080 --device=1 --platform=1 --verbose -v -w128 -f1 mmmmmm@hotmail.com:nnnnnn@pit.deepbit.net:8332
2013-01-13 11:19:18: Listener for "BitLC 0.1" started
2013-01-13 11:19:18: Listener for "BitLC 0.1": Wrong platform or more than one OpenCL platforms found, use --platform to select one of the following
2013-01-13 11:19:18: Listener for "BitLC 0.1":

•    AMD Accelerated Parallel Processing

I tried adding various --platform=x to the "Extra Flags" but it doesn't seem to be recognised.

Any ideas how to get around this?

Do I need to update GUIminer ?
Do I need to update poclbm ?
Do I just need to configure something differently ?

TIA.

[davebodger]

Ahhh, sad to reply to my own post but I guess it's one way of working my way out of the noob section.
Ok, in case anyone else has a similar problem to me.......

I managed to get the second card working by copying the python poclbm startup line from the GUIminer log into a fresh terminal window and put "sudo" on the front then changed the "platform=1" to "platform=0".
I deduce from this that it is an issue with GUIminer, so my next move is to try and update that.
I've never played around with GitHub before, so now's my chance.

Wish me luck.