Reader unavailable?

Hi, 

I'm using the GemPC 430 reader(ifd-gempc 0.8.1), pcsc-lite middleware 
(pcsc-lite 1.2.0-rc3) and libusb 0.1.7. 

When I start pcscd daemon first, it works well like this. 

======================================================== 
MUSCLE PC/SC Lite Test Program 

Testing SCardEstablishContext : Command successful. 
Testing SCardGetStatusChange 
Please insert a working reader : Command successful. 
Testing SCardListReaders : Command successful. 
Reader 01: GemPC430 0 0 
Enter the reader number : 1 

Waiting for card insertion 
: Command successful. 
Testing SCardConnect : Command successful. 
Testing SCardStatus : Command successful. 
Current Reader Name : GemPC430 0 0 
Current Reader State : 34 
Current Reader Protocol : 0 
Current Reader ATR Size : 11 
Current Reader ATR Value : 3F 6D 00 00 80 31 80 65 B0 05 01 02 5E 83 00 90 00 
Testing SCardDisconnect : Command successful. 
Testing SCardReleaseContext : Command successful. 

PC/SC Test Completed Successfully ! 
======================================================== 

However, some minutes later, it doesn't work. 

======================================================== 
MUSCLE PC/SC Lite Test Program 

Testing SCardEstablishContext : Command successful. 
Testing SCardGetStatusChange 
Please insert a working reader : Command successful. 
Testing SCardListReaders : Command successful. 
Reader 01: GemPC430 0 0 
Enter the reader number : 1 

Waiting for card insertion 
: Command successful. 
Testing SCardConnect : Reader/s is unavailable. 
======================================================== 

What's the problem? Please tell me why this happens. 

Thanks. 


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