AdWords stopped displaying my ads (almost)

[olgerdviz]

I've signed up for the AdWords 7 days ago, started bidding on keywords and for the first few days have been receiving average 7-8 clicks daily for about 2000 impressions. But starting from Friday AdWords displays my ads no more than 200 times a day and I get zero clicks. And its getting worse - today my ads were shown 60 times. I've raised bids, three times up for some keywords - but it's not helping.
Traffic estimator tool is misleading.
What could be wrong?

[Tourz]

You were only getting .4% CTR so they don't show your ads as often. I think they want to see at least 1-1.5% CTR - it demonstrates quality and makes them more money. Try rewriting your ad listing, it can make a huge difference.