Bluetooth Keyboard connection

I've the Keysonic ACK 540BT keyboard with adaptator KSK-10BT under Win7, but it isn't possible to connect it to my laptop... I've tried many options with other software (like bluesoleil...) but no issues.

Once, the keyboard appears but it ask me to enter "security key"... but it isn't possible to enter security key for a keyboard. I've tried also to put low bluetooth security but with no issue too.

Any ideas. Thanks for your help.
Sorry in advance for my english if it's lokk bad : I'm a froggy guy !

Good day.

any up for my problem ??

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