Sorry that no one has answered your question but it would be tough to tell what you are doing if no one has seen you play, but maybe others could give their opinion. One thing that comes to mind, are you keeping it low or higher in the zone.
Keep in mind that there is a reason for GO/FO stats and in pro ball that is real important for a pitcher, I always thought it didn't matter as long as you got an out, but it does matter how that pitcher got those outs. It's not always so much about the HR, because there are a lot of factors (park, wind) that come into play for a HR. GO produce more outs and double plays, which means less time for the pitcher on the mound and the team in the field and less runs. FO's, can be less attractive to the pitcher due to the fact that even though an out, it can mean the man on base advances. That's my perception anyway.
SO Pitchers in pro ball have lower low GO percentages. The guy who can strike out and produces lots of grounders is your well paid ML pitcher.
You might want to talk to your pitching coach about it when you get back, remember those FO with metal bats are home runs.