Mistake?

[Sir Sanderson]

Hi there

It seems to me that there is a mistake in the "Gerund or Infinitive" advanced quiz, question 15: I mustn't forget ....phoning.... OR ....to phoning..... cantrememberthename; the answer is "to phone", yet it is not available. Or is it me who is mistaken?

Best regards

[Tdol]

Thanks for letting us know, Sir S. I'll check and correct it.