android - getExternalStorageState() showing 'mounted' but still unable to create folder -

manifest has

<uses-permission android:name="android.permission.write_external_storage"> 

application settings, 'storage' = modify/delete sd card contents' same results on samsung tablet running 2.3.5 , motorola droid running 2.3.4. devices not tethered development machine.

code follows:

public class outputstudentrecords extends stactivity{    sharedpreferences mstudentsettings;     protected cursor mcursor;     boolean mexternalstorageavailable = false;     boolean mexternalstoragewriteable = false;  public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.create_csv);          string state = environment.getexternalstoragestate();         toast.maketext(getapplicationcontext(),"state " + state, toast.length_long).show();          if (!environment.media_mounted.equals(state)){             //we can read , write media             mexternalstorageavailable = mexternalstoragewriteable = true;             toast.maketext(getapplicationcontext(), "we can read , write ", toast.length_long).show();               file file = new file(environment.getexternalstoragedirectory()                      +file.separator                      +"studentrecords"); //folder name                      file.mkdir();         } else if (environment.media_mounted_read_only.equals(state)){               mexternalstorageavailable = true;               mexternalstoragewriteable = false;               toast.maketext(getapplicationcontext(), "we can read not write ", toast.length_long).show();           }else{                 //something else wrong                 mexternalstorageavailable = mexternalstoragewriteable = false;                 toast.maketext(getapplicationcontext(), "we can't read or write ", toast.length_long).show();           }          }  }   

toast returns state="mounted" skips down "we can't read or write" on both machines. i've missed can't find it, appreciated.

thank you

maybe should change this:

if (!environment.media_mounted.equals(state)){ 

into this:

if (environment.media_mounted.equals(state)){ 

(ie: remove "!")