Error deleting characters in the file name

Hello
I do everything like on this website http://www.advancedrenamer.com/user_guide/regul ar_expresions
and the error pops up when I intercede \
http://oi65.tinypic.com/2wluhjc.jpg
What am I doing wrong?
With (\d+) too...

---

Reply to #1:

In your pic, you have the expression as:
(d+)(.*)

You are missing a slash before the d, so it should be:
(\d+)(.*)

You had it correctly written in your OP.

---

Sorry, you did not read to the end post.

---

Reply to #3:
Ah, that's what you meant. The missing 'o' on the 'to' made me think you were in the middle of a sentence.

---

Reply to #4:
I'm sorry my mistake. Just noticed

---

Reply to #1:
 
Since you want to do a replacement,... use Replace method.





 

---

Reply to #6:
It works. Thank you. But why there shows an error if the expression is correct?

---