I can´t write in a cdrw. only the first time!! why?

[AJBG]

hello. i can´t write in a cdrw two times. i buy a cdrw, burn and them a "clean the cdrw" but later when i try to burn the cdrw a error appears. I have a CREATIVE 4x4x24. I burn cd´s since 1999 but never it appened to me. Sorry my english, i´m portuguese Luis Figo!!!!!!!!!!!!!! Help Me please
Thanks

[Twenty4seveN]

mostly it a memory problem if you get an error when your writing. try to close every application before you burn. do you get the same error when you write something for your harddisk? mabe the CD is damaged.........

also check your settings for your burning program.....