MICCU-RN

Hello, I have a question I am hoping a manager/supervisor could help me with. I graduated in May 2009 with my BSN and have been working for the last year in a 14-bed MICU/CCU. I had a medication error at the beginning of May which resulted in a warning and 6 months of probation. I then had another medication error at the end of June which resulted in the last level of warning (if anything else happens, I will be immediately fired) and 1 year of probation. I was also suspended from work for 4 shifts while it was decided what sort of penalty I would face. I am also required to see a work counselor through our employee assistance program and comply with her recommendations. There was no disciplinary action taken against my license. Both medications were non-ICU specific. I just received a call from the hospital I have been trying to get a job with since the beginning of the year regarding a position I applied for in their MICU. I interviewed with them at the end of April for a different unit before all of my issues at my current hospital but didn't get the position because they wanted somebody with more experience. Now that all of this has happened, I am unsure of how to proceed in disclosing this in the interview process with the new hospital. Do I come out and tell the new hospital right out about the errors? Do I wait until they inquire about it? How many details should I or shouldn't I give about the situation? I am required to give them my current manager as a reference so I would rather tell them outright about the errors in case my current manager says something. Although I am unsure about my manager even being allowed to disclose the errors when they call for a reference. Any manager/supervisor perspective on this would be wonderful. I am really unsure of how to proceed.