wrong firmware load to paradyne adsl modem router

I have load wrong firmware to my paradyne adsl2+ wirlese modem router(model:6218 A1).The DHCP server works and pc grabs IP and status led lights and shows that dsl part works to.but I can't access (modems GUI or control consul).what should I do.reset factory settings dose not work.plz help me.thanks.
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In past problems I've had in loading the wrong update to my hardware, I had to either send the whole product back or order the chip for the product that holds that information that makes your product inoperable.

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