cannot make "\1" to work

[Leszek]

Hi,

I am trying to remove paragraph breaks that start with not a capital letter.
I once made it to work, it was something like:
find:

</p><p class="calibre2">[a-z]

replace:

\1

It is supposed to to remove </p><p class="calibre2"> while keeping the small letter unchanged.
But it does not work for me anymore. After hitting replace button page break goes away all right but I end up with "\1" pasted into the text instead of the first letter.
What I am doing wrong?

[BetterRed]

To capture text you need parentheses as in ([a-z])

BR

[Leszek]

Thank you very much.