plz solve the this problem

[weborakesh]

ERROR in src/app/_helpers/auth.guard.ts(4,39): error TS2306: File 'D:/FRONTIZO/Frontizo/src/app/_services/authentication.service.ts' is not a module.
src/app/login/login.component.ts(5,39): error TS2306: File 'D:/FRONTIZO/Frontizo/src/app/_services/authentication.service.ts' is not a module.