custom language plugin: grammar-kit works, plugin doesn't

 I have the following grammar:

{
 parserClass = "com.first.parser.RulesParser"
 parserUtilClass="com.first.parser.RulesParserUtil"

 extends = "com.intellij.extapi.psi.ASTWrapperPsiElement"

 psiClassPrefix = "Rule"
 psiImplClassSuffix = "Impl"
 psiPackage = "com.first.plugin.psi"
 psiImplPackage = "com.first.plugin.psi.impl"

 elementTypeHolderClass = "com.first.plugin.psi.RulesTypes"
 elementTypeClass = "com.first.plugin.psi.RuleElementType"
 tokenTypeClass = "com.first.plugin.psi.RuleTokenType"

 tokens = [
 INCLUDE_FILE = '*include-file*'
 space = 'regexp:\s+'
 comment = 'regexp:[#|//].*'
 string = "regexp:\"[^\"]*\"|'[^']*'"

 ]
}

ruleFile ::= spacing sections

sections ::= [ spacing include_section spacing ]

include_section ::= (INCLUDE_FILE space+ string spacing)*

spacing ::= (space | comment)*

I've tested this in grammar-kit preview with the following test

*include-file* "file1.trd"
*include-file* "file2.trd"

In the deployment of the plugin, i get the following error: RuleTokenType.space expected, got '"file1.trd"'

any tips?