Bad data received form controller

I try to update controller with "roboup17b-021105.zip" but program gave a message "<FONT color=#ff0000>Verification Error occurred at line 2. Quit and retry</FONT>" after try to update one more time controller updated successfully.
<P style="MARGIN: 0px">However; while reading controller settings, roborun software gave "<FONT color=#ff0000>Bad data received form controller. Same parameters may wrong. Try again or reset the controller</FONT>" message.
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<P style="MARGIN: 0px">controller is AX3500.<BR><BR>How can i fix this problem.<BR><BR><BR>
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<P style="MARGIN: 0px">If you managed to eventually update the software and it verified OK, then you can safely assume that it is properly reprogrammed.
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<P style="MARGIN: 0px">Regarding the bad data received from the controller, first check that the communication is OK. With Roborun, go to the run tab and exercise the controller.
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<P style="MARGIN: 0px">Check also that you consistently get the "bad data" message.

<P style="MARGIN: 0px">Programming progress and verifying process done succesfully. <BR>
<P style="MARGIN: 0px">However; after I try "<FONT color=#0000ff>load from controller</FONT>" i get "<FONT color=#ff0000>bad data ....</FONT>" message
<P style="MARGIN: 0px">and also i try "<FONT color=#0000ff>save to controller</FONT>" this time i get "<FONT color=#ff0000>parameter store error</FONT>".
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<P style="MARGIN: 0px">Cominication port(s) are working. Because; when i open hyper Terminal, controller automatically sends<BR>"<FONT color=#ff0000>RoboteQ v1.7 02/01/05<BR> 13</FONT>
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<P style="MARGIN: 0px">after
<P style="MARGIN: 0px"><BR>"<FONT color=#ff0000>RoboteQ v1.7b 02/11/05<BR> s</FONT>
<P style="MARGIN: 0px">"<BR>messages.<BR><BR>At the same time controller's display flip-flops like<BR> <FONT color=#ff0000>. _<BR> I_I</FONT>
<P style="MARGIN: 0px"><FONT color=#ff0000> I_I</FONT>
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<P style="MARGIN: 0px">after
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<P style="MARGIN: 0px"> <FONT color=#ff0000>I_I</FONT>
<P style="MARGIN: 0px"><FONT color=#ff0000> _ </FONT>
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A solid 8 indicates an undervoltage condition. If it flip flops, it may mean that your supply voltage is marginal. It needs to be at least 11V.

<P style="MARGIN: 0px">My battery voltege 24v and also i check my battery voltage with volt meter.<BR>
<P style="MARGIN: 0px">Are there any new controler update available?
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<P style="MARGIN: 0px">version 17b of the firmware has been out for a while and is very stable.
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<P style="MARGIN: 0px">The problem may also be with the RS232 port if you are using an USB to SRS232 adapter. A few users have reported problems with some brand of adapters.
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<P style="MARGIN: 0px">Please email your phone number via our tech support form so that we can call you to diagnose the problem more accurately. This will be quicker and more effective at this point.