e740 wifi problem

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Hi im'italian
i'have a e740 wireless but i have realy performance problem

i use it with a dlink access point dwl900+

but the performance are realy realy low

i'have 50% of signal (and 2MB of transfer rate) already 4-5 foots

and i dont understand wy :°°°°(((

the same problem in adhoc connetion with a laptop

anyone can halp me??


(winmobile2002 is in italian version)