After an unsuccessful first PhD position in experimental research, how can I get accepted to another program? I am a new PhD student, almost one year into the program. I was in theoretical research in my Master's program and switched to experimental research for my PhD. During my studies I have used a programming language but I do not have any expertise with it. I immediately started to working with this language, but still have great difficulty working efficiently it. I don't have any positive contribution and my supervisor doesn't seem to be happy. 

I don't want to just quit and go back to theory. I really want to continue with experimental study, but not in my current university. When I talked to my supervisor about this he just told me to quit and find something else but I don't believe this is the proper way to motivate a student. 

I've applied for other positions which are of a different topic but also experimental. The people who I contacted were very interested in my studies I have done before. But at the end, these people will contact with my supervisor about my progress and I think he will not say good things about me.

I think I behaved very honest for my new application. One of them knew my supervisor and he wanted me to ask about my current performance and I told him to ask if he wants, but I also explained that this talk wouldn't be a glowing recommendation since I have been unable to meet objectives in my current program. Now I think being honest didn't work for me since I didn't get any response back...

What should I say to those people to get accepted into a different program, since I really want to continue in this experimental field?
If your relation with your current advisor is not good, you probably don't want to cite him/her as reference or ask them for recommendation. Usually one ask recommendation only from people we are sure they have a good opinion. Maybe someone else from your Master can give a better opinion of you. Or colleagues/postdoc/teaching assistant in your current position.

This does not mean you need to hide the current situation. It is better to introduce the problem when you say why you want to change position. And be super clear with the situation, if they ask you what was the problem, be open with it. If you are hesitant to speak, they will feel there is something shady and might become suspicious. Also you should not try to discredit your current supervisor, but you can try to explain why his/her expectations were not met.

If they still insist on contacting your current advisor, then let it be, there is not much more you can do.