Shutter will not open, even with new bat...

I purchased a minolta X-9 at an antique store, it appears to be in very good condition. I replaced the 2 battries with Duracell 303/357 1.5v and listed on package was 303/SR44/SR47/A/J. The led lights in the view finder come on when pressing the shutter button part way down. I tried loading new film in the camera but was unable to advance the film using the lever, the lever moved the first 30 degrees, but would not move any farther. I removed the lens and found that the shutter was shut and won't open. According to the manual the shutter will close and not open when the battery power is low. I am wondering if I purchased the incorect battery. This same thing happen when I bought batteries at the grocery store for my mother inlaws earing aid, the hearing aid company said all batteries are not created equal. What could be the problem? Or should I send the camera in for service? What is your opinon?