Thread Subject: can the old xpc RS-232 blocks be used in 2009b?

Thanks a lot!
I read the documentation for serial communication(the xpc_target_I/O_reference Charpter 3)carefully.I made sure that I can use the serial communication block(the RS-232 Mainboard Setup\Send\Receive block). However,I found that there are some differences between the block in the documentation and the block in Matlab 2009b.
 
In Matlab 2009b,when double click the RS-232 Mainboard Setup\Send\Receive block,there is a short message in the Block Parameters dialog box,for exsample in the RS-232 Mainboard Send/Receive block's Parameters dialog box says that:
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     Version 1.0 compatible Mainboard Send/Receive
      Backward compatible for old models
     Not for use in new models
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Is it means that the block can't be used in the Simulink now ?
or the old block in the demo xpcrs232v2.mdl can be used in Simulink now ?
thank you!!!
            Red Stone