Beta11 Child componets forced to create new instances

in Beta10,
I was working fine using


to call provider service component like this:
import {GlobalService} from './providers/global-var';

and then in all other pages i can easily inherit, change and store the variables in GlobalService.

in Beta11 however it throws me errors, forcing me to create independent GlobalService instances making it impossible to share variables between components.

For example I created a model component in SomeService, it throws me the error:
EXCEPTION: Error: Uncaught (in promise): EXCEPTION: Error in ./SomeService class SomeService_Host - inline template:0:0 ORIGINAL EXCEPTION: No provider for GlobalService!

It forces me to create a new instance to get rid of the error:
providers: [GlobalVar]

but that defeats the purpose of creating a global accessible service.

Am I doing it wrong? But it totally worked in Beta10