clarins online store

Hi,
Could anyone translate this for me please?
I have been trying to register for Clarins and Me online shopping site . I filled my name in, first in alphabet and it was declined, then again in hiragana and it keeps coming up with this message:
全角で入力してください
I think it means please type your name in full? ie kanji?
(but I don't have kanji)
Hope someone can help!
There isn't a Clarins in my area.
Thanks,

This says "please enter in double byte." You must have entered ﾌﾞﾛｯｻﾑ (for "blossom"). What they want is ブロッサム, the same katakana in double-byte.

If yoi use IME, you have options to input Hiragana, Full-width(全角) or Half-width (半角)katakana & alphnumeric.

thanks for your help,
I'm sorry to sound ignorant, but how do you convert to double byte characters? I know how to do it on my mobile phone but not PC....