XDS510USB (Rev.A) Emulator connection failure (Error 0x80000240/-1135)

We have two Spectrum Digital XDS510USB JTAG emulators (Rev.A)   purchased around 2003.

We use these emulators to debug TMS320C5502 processor with code composer studio v3.1.

It works fine.

Recently, we have another project using a different type of processor.

We develop the platform board which contains TMS320C6414T.

We heard XDS510USB JTAG can be applied to C6000 series. so we try to use it.

When we try to connect the target board, then these error messages occurs.

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Error connecting to the target:
Error 0x80000240/-1135
Fatal Error during: Initialization, OCS,
Unrecoverable emulation error

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So  we change the development environments. (Change one thing from original setting)

Test with TMS320C6416 DSK (720MHz) : same error messages.

Test with CCS v3.1, v.3.3, v4.2.3: Same error messages.

Test with TMS320C5502: works fine.

Test with XDS560: works fine.

Sdconfigex test result

** Emulator Test **

$$ EmuProductName=XDS510USB

$$ EmuPortAddr=0x510

$$ EmuPortMode=USB

$$ ProductId=510

$$ ProductVersion=84

** Emulator Scan Test

-- Found JTAG IR length of 8

-- Found 1 JTAG device(s) in the scan chain

Would you please help me ? how can I resolve it?