Stuck very badly please help!

[Mr. Half-life]

Ok, i am in sandtraps level and needhelp very badly. I am at the spot where you try to go up a ladder but nothing happens. It's past the fire where you hit the wood to go up. I need help getting to p0latforms up above metal unclimable ladder.Thank you.

 

[Hypnosos]

I had problem with the ladders don't "working", very strange.. Anyway, you know for sure where to go if you use this walkthrough.
http://www.visualwalkthroughs.com/halflife2/sandtraps/sandtraps.htm

 

[Mr. Half-life]

Thank you but I guess I'll try cleaning my disc I rented it and didn't check the back. Thanks again=)

 

[Shasta]

Try the solution you gave to someone else that needed help-

u need to eat kentucky fried chicken