2002 Dodge Dakota

Steering problem
2002 Dodge Dakota V8 Four Wheel Drive Automatic 100000 miles

Can't turn the key to start the truck. Had it rebuilt by a locksmith. Failed and locked up 2 weeks later. Locksmith came out and repaired/rebuilt again. Now another 2 weeks later, it has locked up again.
Waiting for the locksmith again, not sure if he will warrent his repairs since 1 month has passed since the initial repair was made.
What could be causing this ignition lock up. Should I just replace the ignition switch now that 2 repairs have failed? Should the locksmith cover these failed repairs?
March 11, 2008.

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