Transposition

Please can any one help!
I need to transpose some trombone bass clef music to treble clef. I have input all the original music, then changed the clef to treble, then transposed it up an octave and a major 2nd. What is happening is that the key signature changes but puts accidentals next to relevant note - for example in G major all individual f's have a sharp next to them. How can I carryout my need but maintain the key signature??
Fingers crossed!
I need to transpose some trombone bass clef music to treble clef. I have input all the original music, then changed the clef to treble, then transposed it up an octave and a major 2nd. What is happening is that the key signature changes but puts accidentals next to relevant note - for example in G major all individual f's have a sharp next to them. How can I carryout my need but maintain the key signature??
Fingers crossed!