Crystal Report adding a space between fields

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CrystalReports

I have a CR that I am working on. I have a Prefix data field, First Name data field and Last Name data field. On the report they look like this:

Dr.MarkFun

I am trying to get it to look like this:

Dr. Mark Fun

I am using this Formula to trim it:

Trim({TableCEO.Prefix})&trim({TableCEO.FirstName})&trim({TableCEO.LastName})

Which works fine but I get this:

Dr.MarkFun

I tried to use this:

Trim({TableCEO.Prefix})&trim({TableCEO.FirstName}+space(30-length)&trim({TableCEO.LastName}))

The error comes up saying: "Not enough arguments have been given to this function."

How can I get the result I need for the report? What did I do wrong in my code?