Why OAT application download error thru x-modem

Do you face such x-modem download problem? The OAT application “hello world” attached was built by my OASIS2.10, but it failed on download, but original SDK helloword sample is normal. Maybe my SDK installation had some problems?
at+wopen=2
+WOPEN: 2,“AT v06.00”

OK

+WIND: 1
ati3
R72_00gg.Q2687H 2045812 081808 17:44

OK

+WIND: 16
at+wdwl
+WDWL: 0
BB0
*** ERROR IN HEADER ***
at+cfun=1
OK

+WIND: 13
at+wopen=2
+WOPEN: 2,“AT v06.00”

OK

You propably compiled against the wrong os?
(happened to me with the same error)