Regular Expression works in search but not in Parser

[jch]

I am trying to detect the following Comments in a custom SynWrite lexer.

# Comment at start of line
# Comment proceeded by spaces

If I use the expression below in Search it detects both types of comments. The same expression in parser only detects the "Comment at start of line"

^\s*?\#

[Alexey]

replied in Github.
you must turn off "skip spaces" in lexer general options.

[Alexey]

Can you show your lexer, please?