Beef in Ale tastes bitter -HELP!!!

[nomiddlename]

Having 8 people round for dinner tonight and I've done Jamie Oliver's Beef in Ale recipe but, following the comments about it, used an ale rather than Guiness - as he suggests.

However, on tasting it last night, it has a bitter aftertaste.

Any ideas on how to get rid of that? Would sugar or garlic do it?

Ironically, I've woken up today with a blocked head and loss of smell and taste so slightly concerned it'll all taste like metal to me!!!!

TIA

[dreamingofsun]

i've added bit of sugar to this type of recipe before and its helped - just try little bit and get someone to taste till ok - say 2 teaspoons