Memorex cd-rw 4x/erasing problem

Why can’t I erase my memorex cd-rw in nero. When I choose for full or quick erase option. It begins to erase but after a couple of seconds the following message apears. (write error!). Please can someone help me.

What’s the ATIP of your disc?

What do toy meen by Atip?

The manufacturer of your disc is noted in the ATIP. Read it with Feurio or CDR-Identifier.

Where can I find these software?

www.feurio.com

What happens after I do this?

where is that fuction you mentioned earlier?

I got it: this is the manufacturer: INFODISC Technology Co., Ltd. (Type 0)
And this is the ATIP:Minimal recording speed: ?x, maximal: 4x