i need help with the stakes

i usually play the 10-20 nlh in my local cardroom, been doing great playing those stakes. i cash out aroun 1000-1800 a night. i play really solid in that game.

however, when i play the 50-100nlh with the same players, i screw up big time, losing aroung 6k a session. i notice that i lose my patience playing that game, but i know i can beat that game.

any ideas why and how will i beat it?

[orange]

This should probobly be posted in either Mid-High stakes, or Psychology forum.

[elus2]

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This should probobly be posted in either Mid-High stakes, or Psychology forum.

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or not at all?

[Niwa]

I vote for not at all.