XBee SX Pro tests

we started our first tests with the XBee SX Pro using the Development kit, using stock antennas

Our initial results using the 2 sx pros included in the kit show a max datatransfer of 40.1kbs

current configuration: no encryption, CE=[2], BD=921600[A], firmware version=9003, API mode enable=[1]

the units are 16feet from each other
could you please suggest how we can get a better throughput?

If you have not done so, turn off all retries (RR), multi-transmits (MT)and lower the Power level to (PL) 0

done, but the throughput utility shows a steady 40.8kbs. antennas orientation and distance within 6ft dont make difference

attached pls find the exported profile xmls of the 2 boards

Do you see anything we could change?
br,
dan

sx pro 1

  00000000000003FFFFFFFFFFFF
  0
  7FFF
  0
  2
  0
  0
  0
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  7
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  FFFF
  C0
  0x20
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  11
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  A
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  3
  13F
  1
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  1
  0
  0
  0
  0
  1
  0
  1
  1
  1
  1
  0
  0
  1
  1
  1
  1
  1
  1
  1
  FFFFF
  FFFFF
  0
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  28
  1
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  1
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  1
  FFFFFFFFFFFFFFFF
  0
  0
  0
  0
  0
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  0
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  0
  0
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  0
  0
  0
  FF
  0
  2
  1
  12C
  D08
  0
  2B
  64
  3E8
  F0000

===========

sx pro 2

  00000000000003FFFFFFFFFFFF
  0
  7FFF
  0
  2
  0
  0
  0
  0
  7
  1
  3
  0
  FFFF
  C0
  0x20
  82
  0
  11
  0
  
  A
  0
  0
  3
  13F
  1
  0
  1
  0
  0
  0
  0
  1
  0
  1
  1
  1
  1
  0
  0
  1
  1
  1
  1
  1
  1
  1
  FFFFF
  FFFFF
  0
  0
  0
  28
  1
  0
  1
  0
  1
  FFFFFFFFFFFFFFFF
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  0
  FF
  0
  2
  1
  12C
  D08
  0
  2B
  64
  3E8
  F0000

===========