B@ggeration. Anchor screw rescue required!!

[Heeber]

Hi folks,
am mounting a towel radiator on a porcelain tiled wall.

After several lifetimes, I've drilled the 4 holes required. I've drilled them wide enough so that I can use plasterboard wall anchors (the metal collapsible type) directly into the wall behind the tile (so as not to split the tile).

So, 3 go in fine, then bizarrely the last one has the screw spinning regardless of direciton of screwing. Note - the actual fixing remained properly bedded and didn't spin. I've finally got the screw out, but now am a bit screwed (pun intended).

Anyone had this happen/have any ideas? Obviously can't resite the thing!

I'm considering trying to get a machine screw longer than the current one (75mm), but failing that - am open to any suggestions!

So near, and yet.....

Many thanks,
Heeb

[chris_on_tour2002]

may sound obvious but are you picking up the thread on the fixing buried in the wall? is the thread sound?