Error when creating a checkpoint

[qtp_user]

Hello

I am new to qtp and doing some self learning using the tutorial and the mercury tours application.
I am trying to create a checkpoint in qtp and it gives me the following error:

Cannot create checkpoint
cannot identify the webedit. I tried this on a few objects and got the same error everytime.

Can anybody please suggest a solution.

Thanks a lot for your time and advice.

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sorry forgot to add I am using qtp 10.0 with web addin only selected.