diff --git a/src/biograpy.egg-info/PKG-INFO b/src/biograpy.egg-info/PKG-INFO
index 2f83d17..d0984c1 100644
--- a/src/biograpy.egg-info/PKG-INFO
+++ b/src/biograpy.egg-info/PKG-INFO
@@ -1,6 +1,6 @@
-Metadata-Version: 1.0
+Metadata-Version: 1.1
 Name: biograpy
-Version: 1.0bdev
+Version: 1.0b0.dev0
 Summary: UNKNOWN
 Home-page: UNKNOWN
 Author: Andrea Pierleoni
diff --git a/src/biograpy.egg-info/requires.txt b/src/biograpy.egg-info/requires.txt
index b0441e4..0256fb2 100644
--- a/src/biograpy.egg-info/requires.txt
+++ b/src/biograpy.egg-info/requires.txt
@@ -1,4 +1,4 @@
 setuptools
 biopython
 matplotlib>=1.0
-numpy>=1.1
\ No newline at end of file
+numpy>=1.1
diff --git a/src/biograpy/__init__.py b/src/biograpy/__init__.py
index 8a2de88..888894c 100644
--- a/src/biograpy/__init__.py
+++ b/src/biograpy/__init__.py
@@ -1,4 +1,4 @@
-from drawer import Panel
-from seqrecord import SeqRecordDrawer, SliceSeqRec
+from biograpy.drawer import Panel
+from biograpy.seqrecord import SeqRecordDrawer, SliceSeqRec
 
 __import__('pkg_resources').declare_namespace(__name__)
diff --git a/src/biograpy/drawer.py b/src/biograpy/drawer.py
index faceb21..ddebabc 100644
--- a/src/biograpy/drawer.py
+++ b/src/biograpy/drawer.py
@@ -12,7 +12,7 @@
 
 import matplotlib, warnings, operator
 matplotlib.use('Agg')
-import tracks 
+import biograpy.tracks
 from matplotlib.font_manager import FontProperties
 
 warnings.simplefilter("ignore")
diff --git a/src/biograpy/seqrecord.py b/src/biograpy/seqrecord.py
index 6bdb497..5ce2db3 100644
--- a/src/biograpy/seqrecord.py
+++ b/src/biograpy/seqrecord.py
@@ -274,7 +274,7 @@ def draw_features_ordered_by_gene_struct(self,gene_code=None):
                     gene_name=' - '.join(Lgene_name)
                     break
         if not gene_code:
-            raise ValueError, "Cannot draw gene structure, without a gene code"
+            raise ValueError("Cannot draw gene structure, without a gene code")
 
 
 
@@ -390,7 +390,7 @@ def SliceSeqRec(seqrec,start=None,end=None,include_feature=[],exclude_feature=[]
     if end is None :
         end = -1
     if (start < 0 or end < 0) and parent_length == 0 :
-        raise ValueError, "Cannot support negative indices without the sequence length"
+        raise ValueError("Cannot support negative indices without the sequence length")
     if start < 0 :
         start = parent_length - start
     if end < 0  :