Question for gurus

Can anybody give a reasonable explanation to the below phenomenon:
- I have a Nokia E61;
- I have a laptop with MS and WIDCOMM BT stacks;
- when I try to install "Nokia E61 Bluetooth modem" driver, this modem NEVER works, and the modem does not respond;
- but if I install something like Standard Modem over Bluetooth link, everything is fine - this modem responds, connects to the Internet, etc.
So, my question is: WHY?
Were Nokia people too clever to forget to make their own driver work? Or there is some other reason?
And what about performance? Does the usage of the generic driver instead of special one affect the performance of the device? Will EDGE work on Standard BT modem link?

standard modem over bluetooth link is part of the ms bluetooth stack i think, so this will be used most of the time. if the device needed a specfic driver it would use the nokia one.
the driver will not affect performance.
if you have edge, i would ask the network about it.

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    If you had to build a business application that has to allow users to, spell and grammer check, and perform financial calculations, and render the HTML, how would you compare the effort to do this in Windows versus that in Linux, AIX, Solaris or any other Unix operating system?
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    BUT this is all done from the stock system that is on every OS X computer not simply those with Office installed. Obviously you'd need to add some features that were more complicated than this - because any halfway decent programmer could turn this stuff out - and polish takes a while but to meet the requirements of the challenge it would take 2 days tops.
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