The problem of connecting SE HBH-610a via Bluetooth to a PDA ASUS 636

Dear Sirs, if any of you have encountered such a problem and could solve it or just know the answer, please help.

There are bluetooth handsfree Sony Ericsson HBH-610a

And also, there is a PDA ASUS A636 .

The problem is that it finds the HBH-610a, but does not want to connect it. :(

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OS: Windows Mobile 5 Rus