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PSPICE-FOR-TI: USER AUTHENTICATION - INTERNAL ERROR MESSAGE. Please go to httpe2e..ti.com for further assistance. (-1)

Part Number: PSPICE-FOR-TI
I am trying to install pspice for TI.
however it asks for user authentication before installing
after "enter user credentials registered at myTI" I get an error message:
"an internal error occurred. Please go to to http://e2e.ti.com for further assistance (-1)"
I contacted TI tech support and they could'nt help.
what should I do?
thx