Gee, we went through this circuit in a good bit of detail with you on the other site a week or two ago. I'm attaching an image of the simulation, but I replaced the timing cap with one that's 10nF to get the freq up to ~900Hz; 100nF was just too slow.
What are you using for the transistors? If you don't have 9012 and 9013's, you can use 2N2222 and 2N2907's.
Are you absolutely certain that you have identified the pins on the transistors correctly? This is a very common mistake for people to make. Some datasheets show the pins from the bottom of the package, which can lead to a great deal of confusion.
If you are uncertain, then tell us what is the actual part numbers of the transistors that you are using.