urgent help please!!! features greyed out and not responding

hello all,

for some reason, when i was working on a files that i have been working on for some time now, from a certain feature, all the features till the end are greyed out, not responding, and i cant seem to do anything.

even control Q doesent seem to recognise the grey features.

of course they are not suppresed, and right clicking the feature just gives me- roll forward, previous and end etc'.

this is the first time i ever seen this problem, and for now its only in one part.

here is a picture:

any help will be great.

thanks, jhoel

SolidworksParts And Features